Finding the Fourth Proportional to 2,157,979.72, 2,977,567.32 and 1,240,031.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157,979.72 : 2,977,567.32 = 1,240,031.47 : x
2. Step 2: Convert to fraction form
   2,157,979.72/2,977,567.32 = 1,240,031.47/x
3. Step 3: Cross multiply
   2,157,979.72x = 2,977,567.32 × 1,240,031.47
4. Step 4: Simplify right side
   2,157,979.72x = 3,692,277,180,843.56
5. Step 5: Solve for x
   x = 3,692,277,180,843.56/2,157,979.72
6. Step 6: Final answer
   x = 1,710,987.90